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engines/gob/image/brc.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * @file
+ * Image decoder used in engines:
+ *  - gob
+ */
+
+#ifndef IMAGE_BRC_H
+#define IMAGE_BRC_H
+
+#include "graphics/surface.h"
+#include "image/image_decoder.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Graphics {
+struct Surface;
+}
+
+namespace Image {
+
+/**
+ * @defgroup image_brc BRC decoder
+ * @ingroup image
+ *
+ * @brief Decoder for BRC images.
+ *
+ * @{
+ */
+
+class BRCDecoder : public ImageDecoder {
+public:
+	BRCDecoder();
+	~BRCDecoder() override;
+
+	// ImageDecoder API
+	void destroy() override;
+	bool loadStream(Common::SeekableReadStream &stream) override;
+	const Graphics::Surface *getSurface() const override { return &_surface; }
+	const Graphics::Palette &getPalette() const override { return _palette; }
+
+private:
+	Graphics::Surface _surface;
+	Graphics::Palette _palette;
+	Graphics::PixelFormat _format;
+	void loadBRCData(Common::SeekableReadStream &stream, uint32 nbrOfChunks, bool firstChunkIsRLE);
+	void loadBRCDataColumnWise(Common::SeekableReadStream &stream, uint32 nbrOfChunks, bool firstChunkIsRLE);
+
+	void readRawChunk(Common::SeekableReadStream &stream, uint16 *&dest);
+	void readRLEChunk(Common::SeekableReadStream &stream, uint16 *&dest);
+	void readRawChunkColumnWise(Common::SeekableReadStream &stream, uint16 *&dest, uint16 *&destColumnStart, uint32 &remainingHeight);
+	void readRLEChunkColumnWise(Common::SeekableReadStream &stream, uint16 *&dest, uint16 *&destColumnStart, uint32 &remainingHeight);
+};
+
+} // End of namespace Image
+
+#endif